The security of America's
airports is under scrutiny Friday after two separate incidents on Christmas Day. One incident occurred at
Sky Harbor Airport in Phoenix, and another, 2,400 miles away at Newark Liberty Airport
in New Jersey.

Both facilities spent big
money to keep anything like this, or something worse, from ever happening.

In both instances the
suspects managed to scale a portion of perimeter fencing that surrounds each
airport, and actually make their way on to the tarmac. The incidents are raising questions
about how this could happen, and what it means for the safety at airports
around the country.

Robert Edward Bump, 49, is seen on surveillance video running onto the tarmac
just moments after a Southwest Airlines plane landed.

Bump climbed
over a nine-feet tall, barbed-wire topped fence, making his way onto the Phoenix
airport grounds. After banging on the
engine of the plane, Bump then sprawled out his arms and wandered past the
aircraft as police officers pulled up and surrounded him.

James Holmes, of the
Phoenix Police Department, said, "Mr. Bump was immediately apprehended,
taken into custody. Officers determined immediately that he appeared
to be under the influence of at least alcohol and possibly drugs."

Bump was apprehended by
police just four minutes after he was initially spotted. Officials don't know
what motivated him, but at a press conference on Thursday, the focus was on how
Bump was able to successfully reach a plane.

After a similar incident in 2005,
the airport spent $10 million to upgrade its perimeter security. This is the
second perimeter security breach since then.

On the same day, at Newark Airport, a man managed to make his way across two runways and reached the terminal. Port Authority of New York and New Jersey Police Chief Louie Koumoutsos said it was "an unacceptably long time for officers to locate a suspect."

Newark Airport also
underwent a multimillion-dollar security revamp -- that system may have failed
to notify law enforcement of the intrusion.

Peter Goelz, former
managing director of the National Transportation Safety Board, said, "We
can spend another $100 billion to make every airport 100 percent secure, and it
won't quite be 100 percent."

Since Sept. 11, there
have been over 25,000 security breaches at airports across the country. Goelz argues technology is just one factor in
keeping airports secure. He said, "You cannot prevent these kind of
intrusions. It's simply impossible so what you have is a layered and measured
response."

Officials at Phoenix Sky
Harbor International Airport believe their system worked properly, CBS News'
Terrell Brown reported on "CBS This Morning." They are proud of how
the situation was handled, and insist that Bump was the only person at risk
on Wednesday.